/Engine/Source/Runtime/Engine/Public/AnimEncoding.h
This class serves as the base toAEFConstantKeyLerpShared, introducing the per-track serialization methods called by ByteSwapIn/ByteSwapOut and individual GetBoneAtomRotation / GetBoneAtomTranslation calls, which GetBoneAtom calls on Seq.TranslationCodec or Seq.RotationCodec.
class AnimEncodingLegacyBase : public [AnimEncoding](API\Runtime\Engine\AnimEncoding)